Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 21.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 09/23/2025   06:20:20   (  70.26,  80.99) 09/23/2025   06:21:31  (  70.21,  81.27)   12.32                71
 09/23/2025   07:10:59   ( -70.03,-111.34) 09/23/2025   07:11:02  ( -70.04,-111.33)    1.36                 3
 09/23/2025   08:01:43   (  69.90,  56.17) 09/23/2025   08:00:30  (  69.89,  56.09)    3.25                73
 09/25/2025   22:37:09   (  70.09,-162.97) 09/25/2025   22:38:01  (  70.12,-162.97)    3.09                52
 09/25/2025   23:27:51   ( -70.02,   4.46) 09/25/2025   23:27:31  ( -70.01,   4.50)    1.95                20
 09/26/2025   00:18:19   (  69.04, 173.19) 09/26/2025   00:17:12  (  69.13, 170.96)   89.13                67
 09/28/2025   14:54:02   (  70.09, -47.18) 09/28/2025   14:54:31  (  70.06, -47.18)    3.19                29
 09/28/2025   15:44:43   ( -69.96, 120.33) 09/28/2025   15:44:01  ( -69.95, 120.30)    1.50                42
 10/01/2025   06:20:17   ( -70.53, -99.41) 10/01/2025   06:21:28  ( -70.41, -98.43)   38.90                71
 10/01/2025   07:10:54   (  70.04,  68.67) 10/01/2025   07:11:00  (  70.03,  68.66)    1.23                 6
 10/01/2025   08:01:35   ( -69.91,-123.82) 10/01/2025   08:00:30  ( -69.92,-123.85)    1.77                65
 10/03/2025   22:37:02   ( -70.12,  17.02) 10/03/2025   22:38:01  ( -70.14,  17.06)    2.26                59
 10/03/2025   23:27:46   (  69.99,-175.48) 10/03/2025   23:27:29  (  69.97,-175.53)    3.44                17
 10/04/2025   00:18:17   ( -69.34,  -7.20) 10/04/2025   00:17:07  ( -69.43,  -8.64)   57.46                70